// let num:number = 10 ; 
// let str:string ='hello zf';
// let bool:boolean = true ; 



// let num1 :number =1 ; 
// let num2:Number =1 ;
// let num3 :number = Number(1)
// console.log(num3)
// let num4 :Number =new Number(1)

const enum ROLE {
    USER ,
    ADMIN ,
    MANAGER
}